Foundational Theory — the 2 books the tradition kept on this shelf
The two books that set the questions everything else argues about: how the body's channels are mapped, why a pulse reading means anything, and what a pattern is before anyone names it. They are read today for the shape of the reasoning, not for the labels.
Every entry below is taken from the same catalogue the product is built on: the title, the hand behind it, when it sits in time, what the book works on, and what it changed. Sentences in bold are the ones we can point an outside source at; the rest is our summary of the book, not a claim from it.
Classic of Difficult Issues (难经)
先秦—汉 托名扁鹊 · Warring States–Han · Nan Jing
Works on: Eighty-one hard questions, each posed and then answered. The book's own contents line sorts them into six runs: problems 1 to 22 on the channels, read there mostly as pulse; 23 to 29 on the channels proper; 30 to 47 on the organs; 48 to 61 on disease; 62 to 68 on points; 69 to 81 on needling. What it picks at are the loose ends in the older writing: if every channel has a moving pulse, why take the pulse at the wrist alone; why is one position divided into inch and foot; how do the organs' sounds, colours, smells and flavours pair with the seasons.
What it changed: It reduces pulse taking to one reproducible act. Every channel has a moving artery, yet the method takes the pulse at a single point, and the text supplies its reason: there the pulse of all vessels assembles, at the hand's greater yin channel. What follows is a scale rather than a feel — inch and foot, nine-tenths of an inch on the yang side, one full inch on the yin, one inch nine-tenths end to end, with verdicts for too-much, not-enough, and the two blocked patterns, and a warning about which pulse already counts as a true-vessel pulse, fatal in someone who looks perfectly well. The format is reusable too: name the difficulty first, then answer it. It fixed pulse-reading on a single spot of the wrist, and across East Asia physicians have been feeling there, under the same names, ever since.
Yellow Emperor's Inner Canon (黄帝内经)
先秦—汉 托名黄帝 · Warring States–Han · Huang Di Nei Jing
Works on: Not a formula book but a corpus of dialogues — the Yellow Emperor asking, Qi Bo, Lei Gong and others answering — on how a person falls ill with the seasons, the hours and the region; on organs and channels, qi and blood, diagnostic method and needling. Our base text binds two works as one: the Suwen in the Tang editor Wang Bing's arrangement, and the Lingshu with a Qing commentary by Zhang Zhicong. Chapters are numbered in their own titles. The early ones regulate life and work with yin and yang; the middle run fever, malaria, cough, pain, impediment and wasting; the later ones turn to needling and annual qi influence.
What it changed: Two sentences carry most of the inheritance. What gets treated is the illness not yet formed — and the book makes that a schedule rather than a sentiment, with spring and summer for nurturing yang, autumn and winter for nurturing yin. And the outside is read to infer the inside, each answering the other the way the drum answers the stick and the shadow the shape — the warrant later books on complexion, tongue and pulse all cite. In 2011 it entered UNESCO's Memory of the World Register, alongside the Compendium of Materia Medica.
Where this leaves our product
Qicura reads a described symptom against this kind of material and returns a pattern in plain language with the sources named. It does not dispense: no herb quantities, no formula composition, no preparation instructions, and no needling technique - those are deliberate limits enforced on the server, not wording we soften for a page.
Educational, self-care content - not a medical diagnosis. For personal advice, consult a qualified practitioner.